The diagram illustrated below shows a DAP fertilizer bag. Study it carefully and answer the questions that follow.
a) What do the figures labelled on the diagram stand for.
18% N, 46%P2O5, 0% K2O
b) With a reason name the class of inorganic fertilizer that DAP belong.
Incomplete compound fertilizer,
Reason; contains only two primary macro-nutrient
c) Calculate the amount of filler material in 200 kg of DAP with a fertilizer grade of 18:46:0.
200-64=135 kg filler material